• Samosa Capital
  • Posts
  • đź“°Was India Wrong to Ban Jane Street? | Daily India Briefing

đź“°Was India Wrong to Ban Jane Street? | Daily India Briefing

Three stories on Indian markets that you can't miss.

Was India wrong to ban Jane Street? India seeks economic reset with China. Singapore sovereign wealth fund signals bolder bets on India.

If you have any questions about India, fill out this form or reach out to Shreyas at [email protected]

Macro

Equities

Alts

Policy

1. Was India Right to Ban Jane Street?

In a move that has reignited debates over how far regulators should go to police financial innovation, India’s SEBI last week effectively banned Jane Street Capital, the giant U.S.-based proprietary trading firm, from participating in local markets. SEBI’s order, which alleges “manipulative and deceptive practices” in India’s booming index derivatives market, represents one of the strongest actions ever taken against a global high-frequency trading player in an emerging economy.

The fallout has been immediate: index option volumes on the NSE dropped nearly 40 percent in the days following the announcement, while global algorithmic traders scrambled to reassure their compliance desks that they were not next in line. Jane Street, for its part, has vowed to challenge the order, arguing that what India deems manipulation was, in fact, textbook arbitrage.

So was India right to pull the plug? The answer depends on whether you see Jane Street’s strategies as a vital source of liquidity or a threat to retail investors already battling a market notorious for its lopsided odds.

What happened? Jane Street, which quietly trades billions in global securities every day, has built its reputation on exploiting micro-inefficiencies using some of the fastest algorithms in the world. In India, regulators allege the firm went a step too far: according to SEBI’s 46-page show-cause notice, Jane Street used large cash equity positions to nudge the Bank Nifty index upward, then simultaneously bet against it using index options, pocketing the spread when the prices snapped back.

Jane Street’s office in New York City

At the heart of SEBI’s case is a set of trades that the regulator says earned Jane Street an estimated $4.3 billion (₹369.1 billion) in “unfair gains” over an 18-month window ending March 2025. SEBI argues that by leveraging co-located servers, dark fiber lines, and cross-border feeds, Jane Street was able to stay milliseconds ahead of local brokers, triggering cascading orders that smaller traders had no realistic chance of front-running or hedging against.

Why does this matter? India’s derivative markets have grown at breakneck speed; the country now ranks as the world’s largest in terms of equity options contracts traded. Yet, that depth belies a striking statistic: SEBI’s own data shows that over 90 percent of individual investors in these markets lose money.

In this context, the case against Jane Street becomes both regulatory and political. SEBI officials argue that sophisticated HFT strategies can erode market integrity by distorting prices in ways retail participants neither see nor understand. The 2015 co-location scandal at the NSE, when select brokers exploited privileged server access to frontrun orders, still lingers as an institutional memory.

Critics of unfettered HFT point to the sheer scale of quote stuffing, with Jane Street allegedly posting and cancelling tens of thousands of orders in microseconds, as evidence that the firm’s strategies do not deepen liquidity but rather create ephemeral noise that punishes slower participants.

What the defenders say. Jane Street has pushed back forcefully. In a rare public statement, the firm called SEBI’s allegations “deeply flawed,” arguing that its trades amounted to classic index arbitrage, buying cash equities when they drift above fair value and selling index futures or options to lock in tiny mispricings.

Supporters of this view, including prominent voices like XTX Markets’ Alex Gerko, have noted that India’s market structure, dominated by zero-day options and shallow institutional flows, naturally creates short-lived arbitrage windows that sophisticated players are well-positioned to close. In their eyes, punishing arbitrage is tantamount to punishing efficiency.

Writing in Money Stuff, Bloomberg’s Matt Levine offered a characteristically sardonic take: “Sometimes a trade is so profitable that you start to wonder: Is the market broken, or am I too clever?” He points out that what regulators describe as “pump and dump” could just as easily be the mundane process of keeping index prices in line with the underlying.

Yet even Levine concedes the bigger question: how much asymmetry is fair? Jane Street’s average order-to-trade ratio, which SEBI claims exceeded 3,500:1 on some days, dwarfs market norms. While that ratio alone doesn’t prove intent to manipulate, it does highlight the speed mismatch between global HFT desks and India’s domestic brokers, many of whom lack the infrastructure or algorithms to compete on the same millisecond battlefield.

What does this mean for Indian markets? In the short term, the ban has introduced an unusual paradox: a reduction in liquidity that could slightly widen bid-ask spreads for options traders, yet potentially make the market feel fairer for the slower-moving retail crowd. India’s exchanges, reliant on the volumes and fees generated by firms like Jane Street, may feel the pinch, but SEBI appears willing to absorb that trade-off in favor of restoring market trust.

Longer term, the question is whether India can find a middle ground. On one side lies the undeniable benefit of algorithmic liquidity: tighter spreads, deeper books, and better price discovery. On the other hand is the risk that a handful of foreign prop shops, armed with ever-faster code and privileged access, systematically siphon profits from millions of retail traders.

India’s policymakers are sending a clear signal that the rules of the game will now favor transparency over pure speed. Proposed amendments would require all algo traders to lodge source code with the regulator, anathema to global quant houses, and to run kill switches that halt strategies if order ratios spike above specified thresholds.

Will other global firms follow? Already, other large players, including Citadel Securities and Millennium, are said to be reviewing their India exposure. Some may opt to shift to fully onshore joint ventures to comply with stricter local oversight. Others could pivot volumes to Singapore or Dubai, where the regulatory environment is perceived to be friendlier to speed-driven strategies.

The ultimate test will be whether India’s domestic brokers can fill the void. Several homegrown firms, buoyed by government support for co-location upgrades and AI-powered surveillance, are investing in their own mid-frequency strategies. If they succeed, the country could gradually replace foreign quant liquidity with domestic tech that plays by clearer rules.

So was India right to ban Jane Street? From SEBI’s vantage point, the ban reinforces the principle that no player, however sophisticated, is above the rules, especially when the average investor bears the brunt of games they can’t hope to understand.

Yet, if you believe markets should reward speed, innovation, and the relentless hunt for micro-inefficiencies, Jane Street’s defenders would argue this is a dangerous precedent. As Matt Levine wryly put it, “There is a fine line between arbitrage and trickery, and sometimes the line depends on who’s slower.”

Either way, the ban marks a turning point for India’s capital markets. For the first time in a decade, the debate is not just about how much foreign money to invite in, but how much speed, secrecy, and algorithmic advantage the system should tolerate.

As India’s derivatives market continues to boom, the rest of the world will be watching closely. Because in the high-stakes race between code and regulation, this won’t be the last time someone gets shown the door.

2. India Seeks Economic Reset With China.

Narendra Modi and Xi Jinping

India is signaling a pragmatic shift in its economic ties with China, as External Affairs Minister Subrahmanyam Jaishankar’s first visit to Beijing since the 2020 border clash highlighted a clear message: removing trade restrictions and resolving border tensions are vital to rebuilding trust. In a year when India is doubling down on supply chain resilience and critical minerals diversification, Jaishankar’s call to end “restrictive trade measures” is a direct response to China’s tighter export controls on rare earths, a move that has rattled global automakers and India’s own clean energy ambitions.

The talks come at a pivotal time for India’s macro strategy. As the world’s second-largest rare earths processor, China holds sway over inputs critical to India’s EV, electronics, and renewable sectors. Ensuring stable access will be key to India’s push to become a credible manufacturing alternative and to meet its ambitious energy transition targets.

The visit also reflects India’s balancing act: deepening South-South ties through forums like BRICS while pragmatically managing competition with its biggest regional rival. With bilateral trade already surpassing $100 billion (₹8.6 trillion) but skewed heavily in China’s favor, India’s push for fairer terms, better market access, and fewer roadblocks could help narrow a persistent deficit that has long weighed on its external accounts.

Whether this momentum can translate into concrete supply chain cooperation will shape India’s efforts to de-risk critical sectors and maintain macro stability as it pursues higher growth and strategic autonomy in a shifting geopolitical order.

3. Temasek Signals Bolder, Focused India Bets as Market Matures.

Singapore

Singapore’s sovereign wealth fund, Temasek Holdings, is sharpening its India playbook as it shifts to making larger, more selective bets on high-conviction sectors in Asia’s fastest-growing major economy. The fund’s India portfolio, already worth $50 billion (₹4.3 trillion), has surged 35 percent this year on the back of capital appreciation and fresh investments, highlighting the scale of global capital chasing India’s resilient growth story.

Ravi Lambah, head of Temasek’s India operations, said the maturing market now allows the fund to “concentrate” bigger capital into fewer businesses, with consumption, financial services, healthcare, sustainability, and transportation topping its watchlist. This disciplined pivot aligns with India’s broader macro trend: the depth of domestic capital markets, a steady regulatory environment, and record retail inflows have boosted exit certainty for long-term investors, a stark shift from a decade ago when liquidity constraints often hampered large PE and sovereign deals.

Temasek’s willingness to partner with India’s family-run businesses also signals a structural vote of confidence in the country’s unique corporate landscape, where generational firms dominate key sectors. Early signs of this strategy are visible in recent moves like its stake in Haldiram Snacks and hospital chain acquisitions via Manipal Hospitals.

As India’s $5 trillion (₹430 trillion) stock market absorbs record mutual fund inflows, the growing ease of large-scale exits gives Temasek, and other sovereign investors, greater comfort to scale up bets in areas tied to rising middle-class consumption and healthcare demand. This next phase of selective, high-ticket investment underscores India’s evolution from an emerging opportunity to a core portfolio pillar for global capital.

How would you rate today's daily briefing?

Login or Subscribe to participate in polls.

See you tomorrow.

Written by Eshaan Chanda & Yash Tibrewal. Edited by Shreyas Sinha.

Sponsor the next newsletter to reach tens of thousands of U.S.-based business-savvy professionals. Reach out to [email protected].

Could your business use expert insights to power growth in India? Reach out to [email protected] for a free introductory call.

Disclaimer: This is not financial advice or recommendation for any investment. The Content is for informational purposes only, you should not construe any such information or other material as legal, tax, investment, financial, or other advice.